Concrete-steel construction.



, P. KI'THNB'. CONCRETE STEEL CONSTRUCTION.

APPLICATION FILED 0GT.22. 1906.

1 :A 2 cf a -PATENTED FEB. 25, 1907.

2 SHEETS-SHEET 1.

N0- 845',554. PATENTED FEB. 26, 1907.

P. KUHNE.

CONCRETE STEEL CONSTRUCTION.

APPLICATION FILED 0OT.22.1906.

2 SHEETS-SHEET 2.

To all iohoiit it concern:

-.; PY UNrrE srArns-Ermrormou Q H I p M E r -STEEL.eo emue Joli. V

- speci'fication m eaas' ratna f raieiited rebjee, 190 7 :Be. it knownthat 1, PAUL Ki'IHN a citizen in thel) r0 ,This 1,,ention relates to p I:ments in .the-conerete-steel construction for .wh ch. Letters Patentwere grantedjflitoj me of the United States, residing in New gh ofBrooklyn, county of Kings,

,andState f New YOIk, have invented 'certa 1n new and usefulImprovements in Goricrete- S;teel Constructions, of which thefollowing-is aspe cification. Y

certain improveheretofore, N ;,773,327, dated Octoher 25,

@190 the object of the improvements being not only toincrease thestrength and..resist vance oi said structure to tensile and shearingstralns throughout the length of the concrete ,fioonng,bea1n, or otherstructure, butma-inly at .the'center and, ends of the structure, and

-obtai n therebyinotcnly the more-perfect interlocklng, and reinforcingof the concrete l;-with-..the. @tensi0 n-bars,, but also greater.VStrength-,. 31Tigidity, land continuity of, the] {same and forv thispurpose the invention con-' assists of aconcrete-steelconstruction-which:

zonduseries oftension-b'ars arranged on the same plane*witlrthejfirst'series ofparalle l tensionebarsl. and provided with obtusely "comprisesa concretebody, a series of lohgi tudinal tension-bars arrangedvertically the,

below'the other insaideoncrete body, a seebent'portions, both sets oftension hars hav- QfliII'gjbflf-UP loop portions, and keys forjzon-jnectingithe. over and under lapping p crtions further, in: combinerlaarsand their ikey connections, of shorter.a'uxiliaryreinforclngtension-bars arranged at the' center of thestructure, said auxiliary ten- 'si'on-barsbeing connected with the main.tension-bars and obtusely-angled tension bars respectively, bytransverse keys extendingthroughtheloopportions of said'tension-bars'wit-h the obtusely-angled tension-b ars, said.

intermediately between the key connections Inain tensiorfn bars beingprovidedwith transverse keys inf their loop portions nter-inech-.

ately between the key: connections with the represents a verticallongitudinal section of set of main, tension-bars, a set ofobtusely-angled'tem l w P UL nun, 1 o r. E W ,r-o'za K y v1 these Ire".tensionrof the-gsaine on the keys. The"eon.-,

h pplijcat ioti filed oattb'r' 22. 1906. Serial No 339,995.

iliary tension-bars; Fig. 2-is a vertical transverse, sectionon litie 22, Fig. I. Fig; 3 is a detail side View showing the connections be-;tween the main 'ttension-bars and the obtusely-angled ten on-Ibars,drawn on a larger scale and partly iIi-section. Fig. 4 is a plan view ofFig. 3., Fhgslh and 6 are detail side yiews, respectively, of an'obtusely-angled tension-bar and a main tension-bar. Fi s. 7 andS areperspective'views showing ie loop oonnectionof the obtusely-angledtension-bars-with the main tension-bars; and Fig. 9 1s a perspectiveview ot the loop con-- neotion between the obtusely-angled and ,maintension-bars, showing the loops over "and under lapping eaoh'other andreadyfor the driving of the looking-key, i flff Sirnila-r'lettersofreference indicate corre- Jd -W e' I Referring to the drawings, ago arepresent a-setot main tension-bars, a plurality of which isarranged'vertically below each other :in the concrete filling b, whichis formed between the I-bearns of a building or in; floor,

@The main tension-bars are preferably made of flatsteel strips, whichare provided at uniorn1fdistances lronr each other with; loop 5 portionsic,"that are bent up'irorn the, body of the-stripsjbycutting twoparallelincisions in the saline. .Anyrequired umberof'sets oftension-barsjinay be arranged parallel h other inrgthe floor, "hearn,"orother .,In theyloops ol' the tension-bars iced transverse bars or' keysd" of l or other?'er0ss secti0n, which extend nd the sides of thetension-bars a a a keys cl arefirmly held in the loops by the are rouSpending parts in "the several figures of the heam, 0r otherconcrete-jsteell construction, j

orete filling enters the loops and the spaces be tween the same andsurrounds the keys, pro- Uducing thereby the direct anchoring and re- Inthe same vertical a. set of obtusely-angled tension-bars e e, l

whiohare provided at the apexesof their an glesswith loops' e in thesame manner as the a main tension-bars, but with this difference,

that theupperportio'ns of the bent-up loops are slightly narrower thanthe'upper portions of the loops of the rnain tension-lo are, so that thenarrower loops can pass between the Pspaoes in the lower portions of theloops and underlap f,upper .portions otthe loops, after IIO whichinterlocking keys are eom--*- posed of two beveledse ions'f are drivenin opposite direction through the over and under lapping. portions ofthe loops, so as to- 5 firmly. lock themai'n tension-bars a, a a to ronecessary that the distances between the loops at the ends of eachobtusely-angled portion ot'the tension-bars, e e is equal to thedistance'be-twee'n the loopsof the-main tension-bars a a a sothat thekeys (1 andf can 1.5 be quickly inserted and driven into the loops andhold the two sets of tension-bars together. The apexes of theobtuse-angled'bars are connected alternately with an upper and lower.main tension-bars, so that a truss-like ,ar-

rangement of the tension-bars in the concrete filling is obtained, bywhich, in connection with the transverse locking-keysf, projecting atboth sides of each set of trussed tensionbars, a firm support fortheconcrete filling forming the floor, beam, or other structure isobtained. The intermediate loops of the upper and -lowermosttension-bars are "pro-' vided intermediately between the key connectionsbetween the main and obtuselyano gled tension-bars with single keys d,which are inserted in the loops of the main tension-.

bars, as shown in Figs. land 3.

At the center of the concrete filling or structure are arrangedshortauxiliary reinforcing 5 tens1on-bars'a and 0, of which the upper one isconnected by an intermediate shorter obtuse-angled bare with theuppermost ten- V sionebar a, while the lower shorter reinforcingauxiliary tension-bar a iskeyed to the 40 loops of the lowermostmaintension-bar and next adj acent obtusely-angled tension -bar, saidshorter tension-bars a a and obtuselyangled tension-bar 6 serving tostrengthen the trussed system of main and obtusely-an- 4 5 gledtension-bars at the center of the stru c-.

turefor instance, of a concrete floorfilling.

where the greatest tension is exerted on the concrete body, and addthereby to any extent as determined'by calculation to the strength ofthe sets of connected main and obtuselyangled, tension-bars employed inthe special construction. In a similar manner the ends of the trussedsets of tension-bars may be reinforced by shorter auxiliary tension andob- 5 5 tuse-angle bars, so as to resist the shearing strains adjacentto the supporting-beams, or

the shorter-a lxiliaryreinforcing-bars may be arranged at any point inthe concrete-steel construction where shearing'or other stresses areexerted on the same.

When a number oi sets of tension-bars are locked and trussed together inthe manner described and firmly embedded by their;

transverse keys in the body of concrete forming the floor, beam, orother structure, in-

[creased strength and resistance against tenstructure, which resistanceis further increased by the'shorter auxiliary. tension-bars at'the'pointswhere the. greatest stress is ex,- erted on the structure.

Having thus described my invention, 1

Patent p 1. Ae opcrete-steel construction consist- 111g ofla' set ofsuperimposed main tensioning the trussed tension-bars,

combination of two sets of-'.tension-barsa distantly from each other anda set of obtusely-angled tension-bars 'arranged in the andalso'providedwith loops vertically bepassin through the loops ofthe mainand obtuse y-angled tension-bars forlocking them together, keys passingthrough the intermediate loops of, the upper and lower closing theconnected sets ofmain and tusely-angled tension-bars. I

3. In a concrete-steel construction, the combination, with a set of maintension-bars provided with loops equidistantly from each locking-keyspassing through the 'loo 5 of the main and obtusely-an'gled tensionars,

and obtuselangled. bars, keys connecting said auxiliary bars with eachother'and with the uppermost and' lowermost tension-bars, anda body ofconcrete surrounding said interlocked andtrussed sets-of main andobtuse-angled tension-bars.

4.. In a concrete-steel construction, the combination of superimposedmain tensionbars having loops bent up vertically therefrom, atension-bar arranged in the plane of said main tension-bars and which isalso provided with vertically-bent-up loops to cooperate with the loopsof said main tensionbars, and wedge-keys passing transversely throughthe loops of said bars and' detachably uniting them into one structure.

5. In a concrete-steel construction, the combination, with a systeinofstraight main tension-bars arranged in a vertical plane-one below the.other'and provided with loop portions formed by parallel incisions atpoints .sileand shearing strains are imparted to the barsprovided withloops, a 'set of obtusely.

bars together, and a concrete body surround- 2. In a concrete-steelconstruction, the

.main set provided with loop port i'ons equi.

low the loops of the main tension-bars, keys main tension-bars, andaconcrete body inshorter auxiliary reinforcing tension-bars claim asnewan-d desire tosecure by Letters same vertical lane as the maintension-bars I other, of a set of obtusely angle d tensionbars also.provided with ioopsunderlapping the loop portions of the maintension-bars,

equidistantlyfiom each other a set of ob tusely-angled tension-barslocated in the same plane with the main tension-bars and also providedwithloop ortions vertioaily in line with the loops ofv't 1emain-tension-har loops, the. loop portions of the obtuselyangled tensionbars being made of slightly less width than the adjacent over or underlapping loop portions of the main tensionbars so as to permitrespectively the over eiidunder-lappin of the same with the'overor'under lapping oop p'ortions of saicl main I tension-bars, and beveledkeys driven through'the over and under lapping loop portions ofbothjsets of tension-bars for lo0k mg the some together to form atrussed support for the concrete body or filling.

In testimony that I claim the foregoing as I myinvention I. have signedmy name in presence of two subseriblngwltnesses.

HENRY J. SUHRBIER.

